18436697 has 2 divisors, whose sum is σ = 18436698. Its totient is φ = 18436696.

The previous prime is 18436681. The next prime is 18436709. The reversal of 18436697 is 79663481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16736281 + 1700416 = 4091^2 + 1304^2 .

It is a cyclic number.

It is not a de Polignac number, because 18436697 - 2⁴ = 18436681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18436097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9218348 + 9218349.

It is an arithmetic number, because the mean of its divisors is an integer number (9218349).

Almost surely, 2^18436697 is an apocalyptic number.

It is an amenable number.

18436697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18436697 is an equidigital number, since it uses as much as digits as its factorization.

18436697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 18436697 is about 4293.7975033762. The cubic root of 18436697 is about 264.1766160156.

The spelling of 18436697 in words is "eighteen million, four hundred thirty-six thousand, six hundred ninety-seven".